Riveting apparatus.



No. 673,445. Patented May 7, I90l.

- J. H. MULL.

BIVETING APPARATUS.

(Application filed Mat. 27, 1900.)

(No Model.) 2 SheatQ-Sheet l.

FIG. 1

WITNESSES: INVE'NTOR:

TNE "cams PETERS ca. worouwu, WASHINGTON. n. c.

No. 673,445. Patented May 7, I90l.

' J. H. MULL.

BIVETING APPARATUS.

(Application filed Mar. 27, 1900.)

(No Model.) 2 She9ts-5haet 2.

WITNESSES: INVENTOR.

UNITED STATES PATENT JAMES HENRY MULL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PNEUMATIC TOOL IMPROVEMENT COMPANY, OF SAME PLACE AND CAMDEN, NEW JERSEY.

RIVETING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 673,445, dated May 7, 1901;

7 Application filed March 27, 1900. Serial No- 10,334. (No model.)

To all whom it may concern:

Be it known that 1, JAMES HENRY MULL, a citizen of the United States, residing in the city and county of Philadelphia, in the State of Pennsylvania, haveinvented and produced certain new and useful Improvements in Riv eting Apparatus, ofwhich the following is a specification.

My improvements relate to apparatus designed to support in adjacency to the work to be operated upon, machines of such magnitude, or subjected to such heavy vibration in operation, as to render it impracticable to manually support them.

My improvements relate especially to apparatus designed for the support of riveting machines for operation upon rivets in localities such as the sides of ships and tanks, and in bridge and other structures.

In the accompanying drawings I show, and herein I describe, a good form of a convenient embodiment of my invention, the particular subject-matter claimed as novel being hereinafter definitely specified.

In the accompanying drawings,

Figure l is a view in side elevation, partly in section, of apparatus embodying my invention in its preferred form.

Figure 2 is a view of the apparatus shown in Figure l, illustrated as employed in connection with a supporting apparatus for riveting tools of a character invented by me and disclosed and claimed in an application filed by me in the United States Patent Office March 27, 1900, as Serial No. 10,332.

Figure 3 is a central sectional elevation of the handle of the riveting tool, exhibiting the valves and valve controlling parts carried .thereon.

. rivet tool operated, for instance, by compressed air received through the pressure conduit 2.

3 is what I term an adjusting cylinder, be-

ing a structure the main portion of the body of which is in the drawings shown as externally of the form of the zone of a sphere, and which structure is formed with a cylindrical bore of diameter in excess of that of the machine which extends through said bore.

The lower end of said bore is provided with a web or plate 4 having an opening, the edge of which, conveniently formed of packing material 5, snugly lits upon the machine.

The packing material referred to may conveniently consist of rubber annuli seated in a suitable recess in said web or plate 4.

Encircling and secured upon the body of the machine within the bore or piston chamber of the adjusting cylinder, is an annular piston head 6, the periphery of which makes contact with the Wall of the piston chamber, and the snugness of the fit of which upon the wall of said chamber may be insured by an annular packing ring '7, of any suitable material secured to said head, as shown in Figure 1.

8 is an air pressure pipe, the discharge end of which is entered in asuitable recess in the plate 4, which recess communicates through a channel 9, with the lower portion of the piston chamber. The upper end of the piston chamber is closed by an annular plate 10, which encircles the machine and serves as a guide in its longitudinal movement.

The adjusting cylinder is as stated externally of the form of the zone of asphere, and I, therefore, herein refer to it as a spherical device, and said cylinder is, in the application of the device shown in Figure 2, illustratedas mountedinacorrespondinglyshaped recess formed in a yoke 11, carried by a carrier arm 12.

It is to be understood, however, that said spherical adjusting cylinder may be mounted in a correspondingly shaped recess formed in any preferred carrying structure.

The yoke 11 happens in Figure 2 to be shown as provided with a shank 13 engaged in a block 14 mounted in the end of the carrier bar 12, so that said yoke has longitudi nal movement independent of the carrier bar for a distance corresponding to the difference in length between the shank 13 and the block 14.

The carrier arm 12 happens, in the apparatus illustrated, to be shown as an angular bar adapted for longitudinal movement with respect to aswivel block orsupportin g bracket, fully illustrated and described in the application referred t0, (and therein, and not herein, claimed), and consisting in brief of the following devices.

The outer end of the bracket 15, which is secured in any desired manner to the structure in which are the rivets to be operated upon, is shown as formed as a split collar 16, of circular section, the lips of which may be drawn together by a set screw 17 engaged in suitable apertures formed in said lips. The shank of said set screw may be provided with an operating bar 18.

19 is a circumferential flange-formed on the inner face of the split ring as plainly shown in Figure 2.

20 is the shank of the swivel block, said shank fitting within the cylindric space in the interior of the split ring, and having an extension of small diameter projecting above the flange 19,where itis threaded and equipped with a nut which nut, bearing upon the flange 19, supports the swivel block in position free for rotation.

21 are cheek pieces of the swivel block, arranged in parallelism a given distance apart and each embodying a recess at each end in which is journaled an anti-friction 'roller 22. The peripheries of the rollers 22 reach the space between, or are flush with the inner faces of, the cheek pieces.

23 is roller mounted on asuitable axle, the respective extremities of which are journaled in the lower portions of the respective cheek pieces, the body of said roller occupying the central space between the cheek pieces and conveniently filling said space except for a space of approximately U-shaped outline existing between the upper portion of said roller and the sides and top of said block.

The carrier bar 12 is of any desired length, and of approximately U-shaped section, and said bar extends through the interspace between the body of the swivel block and the roller 23 the side members of said bar embracing the respective sides of the roller 23 and its top member extending across the periphery of said roller.

In the construction described, the outer faces of said side members are adapted to make contact. with the rollers 22.

- Manifestly the operator in charge of the riveting machine may shift said machine, in moving it from ,rivet to rivetftoward and away from the bracket 15 by slight force exerted upon the machine in such direction as to occasion the sliding movement of the carrierbar through the swivel block, said bar, when the bracket projects horizontally from a side wall as it is assumed to do in Figure 2, bearing its weight upon the under rollers '22,

the roller 23, in such travel of the carrier bar,

serving, with the'body of the swivel block, as a guide for the bar.

The swivel block and the carrier bar, of course, may be rotated together with relation to the supporting bracket.

When the swivel block and carrier bar have been rotated to a desired position, they may be secured in such position by tightening the screw 17, which will bind the split collar tightly upon the shank of the swivel block.

A rotatable bracket carrier or swivel block forming part of a riveting apparatus, adapted to be detachably mounted upon the structure upon which the riveting machine is at work, equipped with a carrier bar, and pro= vided with means to secure said carrier bracket in various positions of rotative adjustment, is not herein claimed, but is set forth and claimed broadly in an application filed by me contemporaneously herewith, as Serial No. 10,330.

The carrier arm and swivel block may describe a complete circle, and, therefore, the operator may without assistance move the supported riveting machine in turn to every rivet within a circular area the center of which is the bracket 15, and the radius of which is something less than the length of the carrier bar.

If desired, the split ring may remain sufficiently loose upon the shank of the swivel block to allow the desired rotative movements of the parts unaccompanied by the manipulation of the screw 17.

In some cases, however, in operating upon the sides of tanks or vessels, from which sides the bracket projects horizontally, it may be desirable to tighten up the screw 17 and clamp the split ring upon the swivel block to relieve the operator from the work of supporting all or part of the weight of the riveting machine which tends, to gravitate to a position in line beneath the-bracket.

When the apparatus is supported on the under side of a structure, however, so that the swinging movement of the carrier bar is in a horizontal plane, there is usually no occasion for tightening said split ring.

Referring now again to the structure shown more particularly in Figure 1, it is manifest that when the pressure is admitted through the pipe 8 to the lower portion of the piston chamber, it will act against the piston head 6 and carry said piston head and the machine 1, together in the line of the axis of the machine, until the piston head encounters or is close to the top plate 10, or the pressure ,through pipe 8 is shut 01f.

- without effect upon, the ope-ration of the hammer carried within the interior of the machine 1.

As a rivet is beaten down under the action of the operating tool of the riveting machine, the machine will, by the entrance of air through 8, follow the depressed rivet, so to speak, and be maintained pressed strongly against it.

The end of the carrier bar opposite to that occupied by the machine, is provided with a strut, conveniently in the form shown, in which it is illustrated as having a tubular socket 24, to which is connected in threaded engagement an extension piece 25, provided with a polygonal boss by which it may be rotated with respect to said socket to secure the desired adjustment. a

The outer end of said extension piece makes contact with the surface in which the rivets operated upon happen to be, and supports the carrier bar and machine against the recoil and rebound due to the impact of the riveting tool against the rivet, and the air pressure between the piston head of the riveting machine, and the plate inclosing the rear end of the bore of the adjusting cylinder, which pressure as it tends to force the riveting machine inward at the same time of course tends to force the adjacent end of the carrier bar outward.

\Vhen the pressure is admitted through the pipe 8, the riveting machine is carried very forcibly against the rivet and incidentally the adjacent end portion of the carrier bar is forced away from the rivet and consequently the other end of the carrier bar is forced toward the surface in which the rivets are mounted, so that said distant end of the bar bears very strongly against said surface through the strut.

The riveting machine is, therefore, maintained very firmly in position, and as the adjacent or machine end of the carrier bar is prevented by the strut from moving farther away from the surface, the entrance of the air through the pipe 8 carries the riveting tool very forcibly against the rivet.

By reason of the spherical exterior of the adjusting cylinder, said cylinder and the machine mounted within it may be freely adj usted to different positions within the spherical recess, so that the machine may be held at any desired inclination with respect to the rivet, said adjustable cylinder with the socket forming, so to speak, a universal joint.

I conveniently control the supply of air to the machine and the piston chamber by the following devices shown especially in Figure 3.

The pressure pipe 2 discharges through the supply port 26 (Figure 3) intoavalve chamber in the handle of the machine, in which is mounted for reciprocation a double headed valve 27, constantly pressed outward by a spring 28 and adapted to be forced inward against the stress of said spring by a manually controllable valve lever 29, so mounted on the handle as to be conveniently manipulated by the operator.

30 is a valve port leading from the valve chamber to give the lead to the pressure by way of the duct 31 to the interior of the riveting machine for the operation of the usual hammer or riveting device.

32 is a port, leading from the end of the valve chamber, with which the conveyer pipe 8 is in communication.

The outer head of the valve 27 is imperforate, while the inner head embodies a longitudinal passage or passages 33, as shown in dotted lines.

34 is an exhaustport leading from the inner end of the valve chamber to the atmosphere.

When the parts are in the position shown in Figure 3, being their normal position, the valve is so located that its inner head closes the supply port 26 and the parts are consequently out of operation.

When it is desired to operate the apparatus, the valve-lever 29 is swung inward upon its pivot, occasioning the inward movement of the valve, and in such inward movement the inner head of the valve uncovers the supply port 26, so that the pressure enters from the pipe 2 to that portion of the valve chamber between the two heads of the valve, from which it passes by way of the port 30 and duct 31 to the machine 1, and by way of the passage 33, port 32, and conveyer 8, to the piston chamber in the adjusting cylinder; the pressure in this arrangement, having contemporaneo us access to both the piston chamber of the adjusting cylinder and the machine.

When it is desired to intermit the operation of the apparatus, pressure of the opera tors hand upon the lever 29, which he has exerted while holding the handle of the ma-- chine and directing the latter, is released, and the spring 28 forces the valve 27 outward, restoring it and the lever 29 to the position shown in Figure 3.

In this position of the parts the supply port 26 is again closed against the pressure in the pipe 2, the pressure in the adjusting cylinder and the conveyer 8 exhausts itself by backing through the port 32, the lower end of the valve chamber, and out through the exhaust port 34.

The pressure supplied to the riveting machine itself is usually allowed to exhaustfrom said machine as fast as it accomplishes its work.

Any remaining pressure in the machine and duct 31 may, however, pass or exhaust to theatmosphere through the passage 33 and exhaust port 34:.

Having thus described my invention, I claim l. Ariveting apparatus, including, in combination with a carrying device, a cylinder fixed in said carrying device against endwise movement, a riveting machine mounted as a piston in said cylinder with its respective ends projecting beyond the respective ends of said cylinder, a piston chamber between said machine and cylinder, and a source of air pressure in communication with such piston chamber, substantially as set forth.

2. A riveting apparatus, including, in combination, a carrier, provided with a spherical or partly spherical socket, an adjusting cylinder mounted in and externally conformed to said socket, and having an inclosed bore, a riveting machine mounted in said bore, and having a piston head conformed thereto, and means for conveying air pressure to said bore, substantially as set fortlr.

3. A riveting apparatus, including, in combination, a movable carrier or support, a cylinder mounted in said carrier or support free for adj ustmenttherein toincline its axis in different directions,a riveting machine mounted in a bore or piston chamber of said cylinder and having a piston head fitted to said bore, means for conveying air pressure to said bore or piston chamber, independent of the air channel for conveying air pressure to the riveting machine, substantially as set forth.

4. A riveting apparatus, including, in combination, a carrier arm or bar having a spherical recess, a spherical adjusting cylinder mounted in said recess, and provided with an internal chamber, a riveting machine extending through said chamber, an annular piston head mounted on said machine, and a source of air pressure in communication with said chamber, substantially as set forth.

5. A riveting apparatus, including, in combination, a carrier bar having a strut at one end and having at its other end a cylinder mounted therein free for adjustment to various inclinations but held against movement in the direction of its own axis, a riveting machine mounted in said cylinder, an annular piston head on said machine which makes contact with the wall of said cylinder, a cap inclosing the end of said cylinder through which cap the body of the riveting machine extends, and means for supplying pressure to the space Within said bore between the annular piston head and said cap, substantially as set forth.

6. A riveting apparatus, including, in combination, a carrier or support, an adjusting cylinder fitted free for adjusting movement to various inclinations on said carrier, a riveting machine mounted in the inclosed bore of said cylinder and provided with a piston head making tight contact with said bore, means for conveying pneumatic pressure to said bore, and independent means for conveying pneumatic pressure to the riveting machine, substantially as set forth.

7. Ariveting apparatus, including, in com bination, a carrying or supporting structure, a cylinder mounted in said structure and free for lateral tilting motion in various directions but secured against movement in the line of its own axis, a riveting machine embodying a rapidly reciprocating hammer mounted within the closed bore of said cylinder and formed or equipped with a pistonhead making contact with the wall of said bore, the respective ends of said machine extending beyond the respective ends of said cylinder, means for supplying air pressure to said cylinder, substantially as set forth.

8. A riveting apparatus, including, in combination, a carrying arm or bar, a strut at one end thereof, a cylinder mounted in said bar at the other end thereof, free for lateral tilting motion in various directions but secured against movement in the line of its own axis, a riveting machine embodying a rapidly reciprocating hammer mounted within the bore of said cylinder and formed or equipped with a piston head making contact with the Wall of said bore and free for longitudinal movement with respect to said cylinder, means for conveying air pressure to said cylinder to occasion the longitudinal movement of said machine therein, and an independent channel for conveying air to the interior of the riveting machine, substantially as set forth.

9. A riveting apparatus, including, in combination, a carrying or supporting structure, a cylinder mounted in said structure free for tilting motion in various directions independent of said structure, but secured against independent movement in line of its own axis, a riveting machine, embodying a rapidly reciprocating hammer, mounted within the inclosed bore of said cylinder and formed or equipped with a piston head making contact with the wall of said bore, the respective ends of the machine extending beyond the respective ends of the cylinder, an air duct leading to the interior of the riveting machine, and an independent air duct leading to the interior of the cylinder, substantially as set forth.

10. A riveting apparatus including an adjusting-cylinder having a straight bore and an external contour approximately that of the zone of a sphere, a carrier having a socket conformed to said adj usting-cylinder, a riveting machine mounted in the bore of said adjusting cylinder and extending beyond its respective ends, a piston head on said machine, fitting the bore of the cylinder, a cap on the end of the bore through a packed opening inwhich cap the machine extends, and means for supplying compressed air to the bore in the region between the cap and the head, substantially as set forth.

In testimony that I claim the foregoing as my invention I have 'hereunto signed my name this 23d day of March, A. D. 1900.

JAMES HENRY MULL.

In presence of F. NORMAN DIXON, THOS. K. LANcAsrER.

IZO' 

